I was able to import before the new version.
However I found a quick solution,
1-Tinkercad export to obj
2-unpack zip
3-throw mtl file
4-SH3d import obj files
Hello

I don't think you can, it's the same problem I have.
When you have as many levels as me about 60, the automatic repositioning is crazy, it would be better if they stood still in their position.
I hope someone can find a solution, because the program is fantastic